Abstract
The abundance and biomass of the main components of the microbial plankton food web (“microbial loop”)—heterotrophic bacteria, phototrophic picoplankton and nanoplankton, heterotrophic nanoflagellates, ciliates and viruses, production of phytoplankton and bacterioplankton, bacterivory of nanoflagellates, bacterial lysis by viruses, and the species composition of protists—have been determined in summer time in the Sheksna Reservoir (the Upper Volga basin). A total of 34 species of heterotrophic nanoflagellates from 15 taxa and 15 species of ciliates from 4 classes are identified. In different parts of the reservoir, the biomass of the microbial community varies from 26.2 to 64.3% (on average 45.5%) of the total plankton biomass. Heterotrophic bacteria are the main component of the microbial community, averaging 63.9% of the total microbial biomass. They are the second (after the phytoplankton) component of the plankton and contribute on average 28.6% to the plankton biomass. The high ratio of the production of heterotrophic bacteria to the production of phytoplankton indicates the important role of bacteria, which transfer carbon of allochthonous dissolved organic substances to a food web of the reservoir.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Zhukov, B.F., Atlas presnovodnykh geterotrofnykh zhgutikonostsev (biologiya, ekologiya, sistematika) (Atlas of Freshwater Heterotrophic Flagellates (Biology, Ecology, and Systematics)), Rybinsk: Dom pechati, 1993.
Kopylov, A.I. and Kosolapov, D.B., Bakterioplankton vodokhranilishch Verkhnei i Srednei Volgi (Bacterioplankton of Reservoirs of the Upper and Middle Volga), Moscow: Sovrem. Gumanitar. Univ., 2008.
Kopylov, A.I. and Kosolapov, D.B., Mikrobnaya “petlya” v planktonnykh soobshchestvakh morskikh i presnovodnykh ekosistem (Microbial “Loop” in the Planktonic Communities of Marine and Freshwater Ecosystems), Izhevsk: KnigoGrad, 2011.
Kopylov, A.I., Kosolapov, D.B., and Zabotkina, E.A., Viruses in the plankton of the Rybinsk Reservoir, Microbiology (Moscow), 2007, vol. 76, no. 6, pp. 782–790.
Kopylov, A.I., Kosolapov, D.B., Zabotkina, E.A., and Strashkrabova, V., Distribution of Picocyanobacteria and virioplankton in mesotrophic and eutrophic reservoirs: the role of viruses in mortality of Picocyanobacteria, Biol. Bull. (Moscow), 2010, vol. 37, no. 6, pp. 565–573.
Kosolapov, D.B., Kosolapova, N.G., and Rumyantseva, E.V., Activity and growth efficiency of heterotrophic bacteria in Rybinsk Reservoir, Biol. Bull. (Moscow), 2014, vol. 41, no. 4, pp. 324–332.
Lazareva, V.I., Stolbunova, V.N., Mineeva, N.M., and Zhdanova, S.M., Features of the structure and spatial distribution of plankton in the Sheksna Reservoir, Inland Water Biol., 2013, vol. 6, no. 3, pp. 211–219.
Mamaeva, N.V., Infuzorii basseina Volgi (Ciliates of Volga River Basin), Leningrad: Nauka, 1979.
Margolina, G.L., Microbiological characteristics of the Cherepovets Reservoir, Mikrobiologiya, 1965, vol. 34, no. 4, pp. 720–726.
Mineeva, N.M., Studies of primary production of plankton in connection with the assessment of the current state of ecosystems of the Sheksna Reservoir, in Vodnye i nazemnye ekosistemy: problemy i perspektivy issledovanii: Mater. Vseros. konf. (Aquatic and Terrestrial Ecosystems: Problems and Prospects of Research: Proc. Conf.), Vologda, 2008, pp. 81–84.
Mineeva, N.M., Pervichnaya produktsiya planktona v vodokhranilishchakh Volgi (Primary Production of Plankton in Volga Reservoirs), Yaroslavl: Printkhaus, 2009.
Romanenko, V.I., Mikrobiologicheskie protsessy produktsii i destruktsii organicheskogo veshchestva vo vnutrennikh vodoemakh (Microbiological Processes of Production and Destruction of Organic Matter in Inland Water Bodies), Leningrad: Nauka, 1985.
Sovremennoe sostoyanie ekosistemy Sheksninskogo vodokhranilishcha (The Current State of the Ecosystem of the Sheksna Reservoir), Yaroslavl: Izd. Yaroslav. gos. tekh. univ., 2002.
Azam, F., Fenchel, T., Field, J.G., et al., The ecological role of water-column microbes in the sea, Mar. Ecol.: Proc. Ser., 1983, vol. 10, pp. 257–263.
Bettarel, Y., Amblard, C., Sime-Ngando, T., et al., Viral lysis, flagellate grazing potential, and bacterial production in Lake Pavin, Microb. Ecol., 2003, vol. 45, pp. 119–127.
Callieri, C., Picophytoplankton in freshwater ecosystems: importance of small-sized phototrophs, Freshwater Rev., 2007, vol. 1, pp. 1–28.
Foissner, W. and Berger, H., A user-friendly guide to the ciliates (Protozoa, Ciliophora) commonly used by hydrobiologists as bioindicators in rivers, lakes and waste waters, with notes on their ecology, Freshwater Biol., 1996, vol. 35, pp. 375–482.
Personnic, S., Domaizon, I., Sime-Ngando, T., and Jacquet, S., Seasonal variations of microbial abundances and virus- versus flagellate-induced mortality of picoplankton in three peri-alpine lakes, J. Plank. Res., 2009, vol. 31, no. 10, pp. 1161–1177.
Sherr, E.B. and Sherr, B.F., Significant of predation by protists in aquatic microbial food webs, Anton. Leeuw. J. Microb., 2002, vol. 81, pp. 293–308.
Simek, K., Pernthaler, J., Weinbauer, M.G., et al., Changes in bacterial community composition and dynamics and viral mortality rates associated with enhanced flagellate grazing in a mesotrophic reservoir, Appl. Environ. Microbiol., 2001, vol. 67, no. 6, pp. 2723–2733.
Sime-Ngando, T., Environmental bacteriophages: viruses of microbes in aquatic ecosystems, Front. Microbiol., 2014, vol. 5, p. 355.
Spyres, G., Nimmo, M., Worsfold, P.J., et al., Determination of dissolved organic carbon in seawater using high temperature catalytic oxidation techniques, Trends Anal. Chem. (Pers. Ed.), 2000, vol. 19, no. 8, pp. 498–506.
Vors, N., Heterotrophic amoebae, flagellates and Heliozoa from the Tvärminne Area, Gulf of Finland, in 1988–1990, Ophelia, 1992, vol. 36, no. 1, pp. 1–109.
Weinbauer, M.G. and Hofle, M.G., Significance of viral lysis and flagellate grazing as factors controlling bacterioplankton production in a eutrophic lake, Appl. Environ. Microbiol., 1998, vol. 64, no. 2, pp. 431–438.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © D.B. Kosolapov, A.I. Kopylov, N.G. Kosolapova, Z.M. Mylnikova, 2017, published in Biologiya Vnutrennykh Vod, 2017, No. 1, pp. 26–35.
Rights and permissions
About this article
Cite this article
Kosolapov, D.B., Kopylov, A.I., Kosolapova, N.G. et al. Structure and functioning of the microbial loop in a boreal reservoir. Inland Water Biol 10, 28–36 (2017). https://doi.org/10.1134/S1995082917010102
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1995082917010102